propagate of 82bb923d0154750ef716b66b498561f882891946 and f51a272341ee12268fe7028bc2f2bad66c603069 from branch 'matt.dbclient.work' to 'matt.dbclient.rez'

--HG--
branch : private-rez
extra : convert_revision : 440ee4177122c8a873ebf8984a90f96a9bd8a56a

- added stderr support for the client
- cleaned up a bunch of "unused" warnings, duplicated header definitions
- added exit-status support for the client

--HG--
extra : convert_revision : 5bdf806d8b440c87f7235414662f4189195618f4

--HG--
extra : convert_revision : 93a39c7b76f478035046b9c6f88af54612cce36f

- Refactored the terminal-mode handling for the server
- Improved session closing for the client

--HG--
extra : convert_revision : 9d19b4f22c39798af5f3f24c2022f8caec4919e8

- More channel cleaning up

--HG--
extra : convert_revision : 385ec76d0304b93e277d1cc193383db5fd773703

--HG--
extra : convert_revision : 67676f36b78efac878c11943d78a5de827498d05

--HG--
extra : convert_revision : cc8a8c49dc70e632c352853a39801089b08149be